From b7b4d4fc5de01c2547e5748a582de97a7e09f247 Mon Sep 17 00:00:00 2001
From: theoreticalbts <theoreticalbts@users.noreply.github.com>
Date: Mon, 14 Mar 2016 23:32:43 -0400
Subject: [PATCH] Deprecate annual memberships #613

---
 libraries/chain/account_evaluator.cpp |  2 ++
 libraries/chain/db_maint.cpp          | 38 ++++++++++++++++++++++++++-
 libraries/chain/hardfork.d/613.hf     |  4 +++
 3 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 libraries/chain/hardfork.d/613.hf

diff --git a/libraries/chain/account_evaluator.cpp b/libraries/chain/account_evaluator.cpp
index 1f29bb0a..42922473 100644
--- a/libraries/chain/account_evaluator.cpp
+++ b/libraries/chain/account_evaluator.cpp
@@ -371,11 +371,13 @@ void_result account_upgrade_evaluator::do_apply(const account_upgrade_evaluator:
          a.lifetime_referrer_fee_percentage = GRAPHENE_100_PERCENT - a.network_fee_percentage;
       } else if( a.is_annual_member(d.head_block_time()) ) {
          // Renew an annual subscription that's still in effect.
+         FC_ASSERT( d.head_block_time() <= HARDFORK_613_TIME );
          FC_ASSERT(a.membership_expiration_date - d.head_block_time() < fc::days(3650),
                    "May not extend annual membership more than a decade into the future.");
          a.membership_expiration_date += fc::days(365);
       } else {
          // Upgrade from basic account.
+         FC_ASSERT( d.head_block_time() <= HARDFORK_613_TIME );
          a.statistics(d).process_fees(a, d);
          assert(a.is_basic_account(d.head_block_time()));
          a.referrer = a.get_id();
diff --git a/libraries/chain/db_maint.cpp b/libraries/chain/db_maint.cpp
index c7e39d75..bccf4958 100644
--- a/libraries/chain/db_maint.cpp
+++ b/libraries/chain/db_maint.cpp
@@ -684,6 +684,37 @@ void create_buyback_orders( database& db )
    return;
 }
 
+void deprecate_annual_members( database& db )
+{
+   const auto& account_idx = db.get_index_type<account_index>().indices().get<by_id>();
+   fc::time_point_sec now = db.head_block_time();
+   for( const account_object& acct : account_idx )
+   {
+      try
+      {
+         transaction_evaluation_state upgrade_context(&db);
+         upgrade_context.skip_fee_schedule_check = true;
+
+         if( acct.is_annual_member( now ) )
+         {
+            account_upgrade_operation upgrade_vop;
+            upgrade_vop.fee = asset( 0, asset_id_type() );
+            upgrade_vop.account_to_upgrade = acct.id;
+            upgrade_vop.upgrade_to_lifetime_member = true;
+            db.apply_operation( upgrade_context, upgrade_vop );
+         }
+      }
+      catch( const fc::exception& e )
+      {
+         // we can in fact get here, e.g. if asset issuer of buy/sell asset blacklists/whitelists the buyback account
+         wlog( "Skipping annual member deprecate processing for account ${a} (${an}) at block ${n}; exception was ${e}",
+               ("a", acct.id)("an", acct.name)("n", db.head_block_num())("e", e.to_detail_string()) );
+         continue;
+      }
+   }
+   return;
+}
+
 void database::perform_chain_maintenance(const signed_block& next_block, const global_property_object& global_props)
 {
    const auto& gpo = get_global_properties();
@@ -830,7 +861,12 @@ void database::perform_chain_maintenance(const signed_block& next_block, const g
       }
    }
 
-   modify(get_dynamic_global_properties(), [next_maintenance_time](dynamic_global_property_object& d) {
+   const dynamic_global_property_object& dgpo = get_dynamic_global_properties();
+
+   if( (dgpo.next_maintenance_time < HARDFORK_613_TIME) && (next_maintenance_time >= HARDFORK_613_TIME) )
+      deprecate_annual_members(*this);
+
+   modify(dgpo, [next_maintenance_time](dynamic_global_property_object& d) {
       d.next_maintenance_time = next_maintenance_time;
       d.accounts_registered_this_interval = 0;
    });
diff --git a/libraries/chain/hardfork.d/613.hf b/libraries/chain/hardfork.d/613.hf
new file mode 100644
index 00000000..74c740fb
--- /dev/null
+++ b/libraries/chain/hardfork.d/613.hf
@@ -0,0 +1,4 @@
+// #613 Deprecate annual membership
+#ifndef HARDFORK_613_TIME
+#define HARDFORK_613_TIME (fc::time_point_sec( 1458061200 ))
+#endif